Improvement in boring-machines



WILLIAM II. DEATRIK, OF IIEIDLERSBURG, PENNSYLVANIA.

Letters Patent No. 108,890, dated November 1, 1870.

IMPROVEMENT IN BORING-MACHINES.

The Schedule referred toiin these Letters Patent and making part of the same.

To all 'whom it may concern.-

. Be itknown that I, WILLIAM H. DnA'rnIomot Heidlersburg, in the county of Adams, and iu the State of Pennsylvania, have invented certain new and useful Improvements in Machines for Boring Posts; and do hereby declare that Vthe following is a full, clear, and exact description thereof, reference being had to the accompanying drawing and to the let-ters of' referencel marked thereon, making a part of thisspeciiication. j

The object of this invention is to supply a inachine for boring holes in fence posts, that is cheap, easily,

operated and managed, and, at the same time, durable and simple in its construction; and

Theinveution consists in the construction andarrangement of the operating partsv with each other, as that the object shall be fully obtained. i

In the accompanying drawing- Figure 1 represents a perspective view of my invention.

Figure 2 is a side elevation of the auger-shaft.

Letter A represents the frame of mymachine, which may be of any desired shape or size, upon the top of which are placed the two guides B, extending from one end to the other.'

C is a sliding carriage, upon which the postto be bored is placed, and securely held in one position dur.- ing the operation of boring by means of the screwclamp G E.

The carriage O freely slides between the guide-ways lOn the top side of the platform, and longitudinaliy placed therein, is a series of holes,'a, in which are placed stop-pins D D. A

Y These stop-pins pass through the carriage,.and ex tend below its under side far enough to strike against the cross-girt b in frame A, or other means which will stop the further reciprocation of the sliding carriage C in that direction.

By the use of the pins D D in holes c c the length of the mortise in the posts, as well as the spaces between the moitises, is easily determined.

Rising np from the sides of the frame are the vtwo uprights H, which are joined together by the two cross-pieces K, and held in upright position by the braces L. -v

Pivoted to one 'of these upright's is the lever M, to

which is attached the auger N, so that it can be raised and lowered to any desired point.

The upper end of this auger is secured to the lever in such a manner as to allow it to turn freely with the pulley O, around which the belt passes.

Extending along the frame, under the slide, there are placed the supports P, which prevent the slide from shaking or moving while the auger is in operation.

In case it should be desired to bore larger holes than can be done with the ordinary auger N, I remove that, and substitute the shaft R instead, which will hold any-sized bit.

In this shaft is placeda bit, S, which has been provided with a screw so as to enable it to bore the more readily.

Operation.

Having secured the po'st to be bored upon the ,carringe C in the proper position, and one of the pins D against the cross-girt under the carriage, the auger is put in revolution, and the first hole is bored. Pin D, that rests against the girt, is then taken out, and as many holes may be bored as desired in the distance the carriage C and post is reciprocated, till it is stopped by the next pin D striking against the girt, when the -pin that is in the next succeeding hole is made to 'Phe sliding. carriage G, having holes a, cand pins D D therein, and clamp Gr E thereon, in combination with the revolving sliding anger N, when constructed to operate in themanner shown.

In testimony thatI claim the foregoingI have hereunto set my hand this 15th day of May, 1869.

WILLIAM H. DEATRICK.

Witnesses:

A. J. Govan, ALLEN JAMESON. 

